[DW] Wait for animation if HubContainerView height has not been updated

Don't force animation when HubContainerView RootView height has
not been updated. When creating a new window with no regular tabs, the parent view for the HubContainerView is not initialized. In this unique case, we queue an animation, which is only run upon initialization of said parent.

Bug: 414748354
Change-Id: I257f829211c922010b7695f0e715c417153203f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6526508
Reviewed-by: Calder Kitagawa <ckitagawa@chromium.org>
Commit-Queue: Fiaz Muhammad <mfiaz@google.com>
Cr-Commit-Position: refs/heads/main@{#1458095}